MechWarrior 1
HexCheat:
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Save the game, NU it, and give yourself some cash.
Money is offset 73 (49h). Fill the three bytes with $FF, and
you'll get about 16.7 Million.
Or if you're REALLY greedy, go to byte 76 (4Ch), and change
that one to 01h to 0Fh (0Fh will give you about 250,000,000).